Make somebody’s blood run cold Definition 1 of 1Pro Tip 1/3Figurative Expression This phrase doesn't mean actual cold blood but describes intense fear or horror metaphorically. When I heard the scream, it made my blood run cold. Pro Tip 2/3Strong Emotion Use it to express a very strong emotional reaction, not just slight fear or discomfort. Seeing the aftermath of the earthquake made my blood run cold. Pro Tip 3/3Horror Context Often used in scary or horror contexts, such as ghost stories or thrillers. The haunted house's legends make my blood run cold.